1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
| ; Check that we create copy the data from the alloca into the coroutine
; frame slot if it was written to.
; RUN: opt < %s -coro-split -S | FileCheck %s
define i8* @f() "coroutine.presplit"="1" {
entry:
%x.addr = alloca i64
call void @use(i64* %x.addr) ; might write to %x
%y.addr = alloca i64
%y = load i64, i64* %y.addr ; cannot modify the value, don't need to copy
call void @print(i64 %y)
%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
%size = call i32 @llvm.coro.size.i32()
%alloc = call i8* @myAlloc(i64 %y, i32 %size)
%hdl = call i8* @llvm.coro.begin(token %id, i8* %alloc)
%0 = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %0, label %suspend [i8 0, label %resume
i8 1, label %cleanup]
resume:
call void @use(i64* %x.addr)
call void @use(i64* %y.addr)
br label %cleanup
cleanup:
%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
call void @free(i8* %mem)
br label %suspend
suspend:
call i1 @llvm.coro.end(i8* %hdl, i1 0)
ret i8* %hdl
}
; See that we added both x and y to the frame.
; CHECK: %f.Frame = type { void (%f.Frame*)*, void (%f.Frame*)*, i1, i1, i64, i64 }
; See that all of the uses prior to coro-begin stays put.
; CHECK-LABEL: define i8* @f() {
; CHECK-NEXT: entry:
; CHECK-NEXT: %x.addr = alloca i64
; CHECK-NEXT: call void @use(i64* %x.addr)
; CHECK-NEXT: %y.addr = alloca i64
; CHECK-NEXT: %y = load i64, i64* %y.addr
; CHECK-NEXT: call void @print(i64 %y)
; See that we only copy the x as y was not modified prior to coro.begin.
; CHECK: store void (%f.Frame*)* @f.destroy, void (%f.Frame*)** %destroy.addr
; CHECK-NEXT: %0 = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 4
; CHECK-NEXT: %1 = load i64, i64* %x.addr
; CHECK-NEXT: store i64 %1, i64* %0
; CHECK-NEXT: %index.addr1 = getelementptr inbounds %f.Frame, %f.Frame* %FramePtr, i32 0, i32 3
; CHECK-NEXT: store i1 false, i1* %index.addr1
; CHECK-NEXT: ret i8* %hdl
declare i8* @llvm.coro.free(token, i8*)
declare i32 @llvm.coro.size.i32()
declare i8 @llvm.coro.suspend(token, i1)
declare void @llvm.coro.resume(i8*)
declare void @llvm.coro.destroy(i8*)
declare token @llvm.coro.id(i32, i8*, i8*, i8*)
declare i1 @llvm.coro.alloc(token)
declare i8* @llvm.coro.begin(token, i8*)
declare i1 @llvm.coro.end(i8*, i1)
declare noalias i8* @myAlloc(i64, i32)
declare void @print(i64)
declare void @use(i64*)
declare void @free(i8*)
|